Okla. Stat. tit. 60, § 60-44: Termination of estate at will

A tenancy or other estate at will, however created, may be

terminated by the landlord's giving notice to the tenant, in the

manner prescribed by the next section, to remove from the premises

within a period specified in the notice, of not less than one (1)

month except as provided in the chapter on "Landlord and Tenant."